Railroad Spike Puller With Guided Hollow Tube for Stable Extraction
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Solution Overview
Problem
Existing spike pullers for railroad spikes lack a simple and stable structure, leading to inefficient and unreliable pulling operations.
Innovation Solution
A spike puller with a housing, a linear displacement unit, and a claw unit, where the linear displacement unit includes a hollow tube guided within the housing, allowing for a stable and efficient pulling mechanism with a maximum stroke height and modular length adaptation, and featuring a carrying handle and protective cap for ergonomic handling and protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional claw unit connection structure is used, then the spike puller can pull railroad spikes, but the structure becomes complex and less stable
Solution Approach 1:
The claw unit is disposed directly at the hollow tube, merging two previously separate components into a direct connection. This eliminates intermediate connection elements and reduces structural complexity while improving reliability through the direct force transmission path between the hollow tube and claw unit.
2Ease of operation
If the hollow tube is allowed to rotate within the housing, then the linear displacement unit has freedom of movement, but the structural stability and guidance precision deteriorates
Solution Approach 1:
The hollow tube and housing are configured with asymmetric cross-sections where the maximum transverse dimension of the hollow tube exceeds the minimum transverse dimension of the housing. This geometric asymmetry prevents rotation while maintaining linear displacement freedom, as the oversized hollow tube cannot rotate within the smaller housing opening.
3Adaptability or versatility
If the spike puller is designed for longer stroke height to handle longer spikes, then the versatility improves, but the device size and weight increase
Solution Approach 1:
The hollow tube serves dual functions as both the guiding element and the linearly displaceable component. This dynamic design allows the same component to provide both structural guidance and the full stroke length movement, achieving long stroke capability without proportionally increasing overall device weight.
Data Source
AI summary
A spike puller for pulling a railroad spike of a track includes a housing, a linear displacement unit mounted at the housing, and a claw unit for gripping the railroad spike. The claw unit is displaceable in a linear manner relative to the housing in a displacement direction by using the linear displacement unit. The linear displacement unit includes a hollow tube which is guided in the housing. A method for pulling a railroad spike of a track is also provided.